Administration: Individual. The DAB-4 is a revision of one of the most popular individual achievement tests available. Its 8 subtests identify studentsâ strengths and weaknesses across important areas of school achievement. A supplemental manual shows how to probe student responses to obtain information about studentsâ thinking processes and problem-solving strategies.
In 1992, the first evidence of a planetary system other than our own was discovered, orbiting the pulsar PSR B1257+12. Three years later, 51 Pegasi b, the first extrasolar planet around a Sunlike star, was discovered.
It is also the first planet identified as a planet by using a telescope. Uranus is the the third-largest and fourth most massive planet in the solar system. Accidental discovery of UranusUranus was discovered by <b>William Herschel</b>, who made the announcement on March 13, 1781.